Acknowledgement of my Thoreau Survey sources and procedures used by each for control of dissemination and licensing of these unique original documents and images.

My sources to date include The Concord Free Public Library (CFPL) especially a publication by Marcia Moss and materials curated by Leslie Wilson, Concord Museum, American Archeological Society Worcester, MA (AAS), Pierpont Morgan Library & Museum at the NYPL and the Thoreau Society.

CFPL has posted survey images piecemeal online. Readers wishing to view an original image in its entirety may need to download and reassemble the pieces using software such as Adobe Photoshop’s map merge capability.